CAV controller variant RN
Circular self-powered volume flow controllers for the control of supply air or extract air in constant air volume systems
Optional equipment and accessories
Application
Special characteristics
Nominal sizes
Variants
Units with acoustic cladding for demanding acousti requirements
Construction
Parts and characteristics
Attachments
Accessories
Useful additions
Construction features
Materials and surfaces
Powder-coated variant (P1)
Stainless steel variant (A2)
Variant with acoustic cladding (-D)
Mineral wool
Standards and guidelines
Maintenance
Functional description
The volume flow controller is a mechanical self-powered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces such that the set volume flow rate is maintained within the differential pressure range.
The aerodynamic forces of the airflow create a closing torque on the damper blade. The bellows extends and increases this force while at the same time acting as an oscillation damper. The closing force is countered by a leaf spring that unrolls over a cam plate. The shape of the cam plate is such that a change in the differential pressure leads to an adjustment of the damper blade in a way that the volume flow rate is maintained almost exactly.
Efficient commissioning
The volume flow rate setpoint value can be set quickly and easily using the pointer on the external scale; no measurements are required.
The advantage over flow adjustment dampers is that there is no need for repeat measurements or adjustments by an air conditioning engineer. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered volume flow controllers A mechanical self-powered controller reacts immediately and adjusts the damper blade such that the set constant volume flow rate is maintained.
Volume flow rate ranges
The minimum differential pressure of CAV controllers is an important factor in designing the ductwork and in rating the fan including speed control.
Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for fan speed control must be selected accordingly.
Nominal sizes | 80 – 400 mm |
Volume flow rate range | 11 – 1400 l/s or 40 – 5040 m³/h |
Volume flow rate control range | Approx. 25 to 100 % of the nominal volume flow rate |
Scale accuracy | ± 4 % |
Minimum differential pressure | 50 Pa (nominal size 80: 100 Pa) |
Maximum differential pressure | 1000 Pa |
Operating temperature | 10 – 50 °C |
Circular volume flow controllers for constant air volume systems, mechanical self-powered, without external power supply, suitable for supply or extract air, available in 8 nominal sizes.
Ready-to-commission unit consists of the casing containing a damper blade with low-friction bearings, bellows, external cam plate and leaf spring.
Volume flow controllers without actuators are factory set to a reference volume flow rate (customers can set the required volume flow rate on site).
Spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.
Casing air leakage to EN 1751, class C.
Special features
Materials and surfaces
Galvanised sheet steel construction
Powder-coated construction (P1)
Stainless steel construction (A2)
Variant with acoustic cladding (-D)
Mineral wool
Construction
Technical data
Sizing data
Air-regenerated noise
Case-radiated noise
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
Life cycle assessment
A life cycle assessment is available for the product series in form of an Environmental Product Declaration (EPD) that has been checked and published by a programme holder.
|
|
Notes on the order code
RN-S
RN
Order example: RN/160/D2
Nominal size | 160 |
Material | Galvanised sheet steel |
Accessories | Lip seal on both ends |
Order example: RN-D-FL/250/G2/B50
Acoustic cladding | With |
Flange | Both ends |
Material | Galvanised sheet steel |
Nominal size | 250 |
Accessories | Matching flanges for both ends |
Actuator | B50 |
Споделете страницата
Препоръчайте тази страница
Препоръчайте тази страница чрез изпращане на линк по имейл.
Споделете страницата
Благодарим Ви за Вашата препоръка!
Вашата препоръка е била изпратена и трябва да пристигне в кратък срок.
За контакти
Ние сме тук за Вас
Моля, уточнете съобщението си и типа на искането
Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65
За контакти
Благодарим Ви за Вашето съобщение!
Вашето съобщение е изпратено и ще бъде обработено в кратък срок.
Нашият отдел за Обслужване-Искания ще се свърже с Вас възможно най-скоро.
За общи въпроси относно продукти или услуги можете да се свържете също с:
Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65
За контакти
Ние сме тук за Вас
Моля, уточнете съобщението си и типа на искането
Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65
За контакти
Благодарим Ви за Вашето съобщение!
Вашето съобщение е изпратено и ще бъде обработено в кратък срок.
Нашият отдел за Обслужване-Искания ще се свърже с Вас възможно най-скоро.
За общи въпроси относно продукти или услуги можете да се свържете също с:
Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65
Type
Acoustic cladding
Material
Flange
Nominal size [mm]
Accessories
Actuator
Volume flow rates [m3/h or l/s]
